A SINGLE-LAYER SLOTTED LEAKY WAVE-GUIDE ARRAY ANTENNA FOR MOBILE RECEPTION OF DIRECT BROADCAST FROM SATELLITE

This paper proposes a single-layer slotted leaky waveguide array anten na for mobile DBS reception. A singlelayer feed structure is proposed, where the feed waveguide is in the same layer as the radiating wavegu ides. This results in the simple fabrication of slotted waveguide arra ys, suitable for mass production, Short radiating leaky waveguides are used to get a large beam-tilting angle of about 50 degrees for the ho rizontal installation of the antenna and a beamwidth broad enough to d ispense with mechanical steering in the elevation plane. A prototype a ntenna sized 30 cm by 21 cm has a maximum of 74% efficiency and more t han 69% efficiency within the DBS band. It also has a broad 1-dB beamw idth of 7.5 degrees in the elevation plane, which enables clear DBS re ception by a picture tube display over about one-third the area of Jap an without elevation tracking.